New Roof Installation in Orange County: What the Process Looks Like Start to Finish
A new roof installation is one of the larger home improvement projects a homeowner undertakes — and one of the least understood. Most homeowners see a crew arrive, hear significant noise for a day or two, and receive a finished roof. Here is what actually happens between those two points.
Step 1: Permit Pull (Before Work Begins)
Full roof replacements require a permit in every Orange County city. Rescue Roofer pulls all required permits before the crew arrives. You should never sign a roofing contract where the permit is an optional add-on or "handled separately by the homeowner." Permitted work is inspected and legally documented — critical for insurance claims and resale.
Step 2: Tear-Off
The crew removes all existing roofing material — tiles, shingles, underlayment, and ridge caps — down to the bare decking. For tile roofs, tiles are removed carefully to assess reuse potential (some specialty tiles are saved for future repairs). The tear-off generates significant debris, which is collected in a dumpster or debris bin staged at the property.
Step 3: Decking Inspection and Repair
With the roof bare, the lead technician walks the entire deck and inspects every panel. Soft spots, rot, moisture staining, or structurally compromised sections are identified and replaced. This is the stage where hidden damage from years of slow leaks becomes visible — and where decking repairs are made before new material goes down.
Step 4: Synthetic Underlayment Installation
Rescue Roofer installs synthetic underlayment only — never felt. Synthetic underlayment is overlapped per manufacturer specification, fastened with cap nails, and sealed at all penetrations and edges. The underlayment is the true waterproofing layer of the roof system. Using synthetic over felt adds 15–25 years of service life to the system.
Step 5: Tile or Shingle Installation
New roofing material is installed from the eave up, with each course lapped over the one below. For tile, battens are often installed to create a ventilated air space beneath tiles. For shingles, starter strips at the eave are followed by field courses. Ridge and hip caps are installed last, mortared on tile roofs or nailed on shingle roofs.
Step 6: Re-Flashing All Penetrations
Every chimney, skylight, vent pipe, HVAC unit, and wall-to-roof transition is re-flashed with new metal. Old sealant is removed and new elastomeric sealant is applied. This step is where most installation failures occur with contractors who cut corners — new roofing material over old flashing is a recipe for early leaks. See our flashing guide for why this matters.
Step 7: Cleanup and Final Inspection
All debris is removed from the property, gutters are cleared of installation debris, and the site is swept with a magnetic tool to collect any stray fasteners. The city inspector then performs a final inspection, and a permit sign-off is issued — your permanent record that the work was completed to code.
Frequently Asked Questions
What does a new roof installation involve?
Tear-off, decking inspection, synthetic underlayment, new tile or shingles, full re-flashing, ridge caps, cleanup, and city inspection.
How long does it take?
1–2 days for a standard single-story home. 3–4 days for complex multi-slope roofs.
Do I need to leave my home?
No — but expect significant noise. Keep pets and children clear of the exterior work zone.
Ready to schedule a new roof installation? Call 1-888-346-7663 for a free written estimate — or request one online. Rescue Roofer, building Orange County roofs since 1993. St. Lic #1137524.